Abstract: A mounting structure of a seat for vehicles comprising a standing holder secured to a car floor, a latch member secured to the base of a seat providing with a stopper in the shape of a hook for inserting said holder thereinto and a cushioning material laid onto a car floor for giving elasticity to said latch member upward.

Abstract: A seat support for a vehicle seat is disclosed which comprises a seat frame, two connection members respectively mounted to the two side members of the seat frame and a support member formed of a cloth. In this seat support, the cloth support member is extended between and mounted to the two side frame members of the seat frame by means of the two connection members. The connection members are fixed to the two frame members respectively in such a manner that the support member can be extended in a tensioned manner.

Abstract: A vehicle seat is disclosed which is provided on its surface with a plurality of intersecting, recessed grooves for decoration. The seat includes a cushion member formed of a foam material and provided on its surface with a plurality of intersecting, recessed grooves. Projections are provided adjacent to the intersections of these recessed grooves, respectively. Such projections can prevent wrinkles from being produced in the intersections of the decorative recessed grooves formed in a top member which is a component of the seat. Specifically, when such top member placed over the cushion member is hung in along the recessed grooves of the cushion member, the recessed grooves for decoration are formed on the surface of the top member. During this hang-in operation, the projections are compressed so that repelling resilient forces are produced in these projections.

Abstract: In a seat comprising a trim cover formed by heat-bonding necessary portions including a main portion formed of a covering material, a filler pad and a backing material to provide the central seating portion of the seat and combined with inner side portions, outer side portions and a welt, the welt is provided by winding a welt cover or an extension of the covering material or inner side portions around a cord, the filler pad is formed of a usual polyurethane material, and the trim cover is bonded to a cushion member having no skin or having a minimum skin.

Abstract: A new and improved fillet welding equipment is disclosed which can be used to butt a pipe member against a plate-like surface and then weld the entire periphery of the butted pipe member. In this fillet welding equipment, a pair of welding torches are arranged such that their respective nozzles are opposed to and spaced about 90 degrees from each other. This pair of welding torches can be rotationally moved simultaneously and continuously through their respective predetermined ranges of about 90 degrees to weld one half round section of the entire periphery to be welded, which results in the reduced welding time.

Abstract: A head-rest for a vehicle seat is disclosed which is mounted to a seat back frame in such a manner as to be free to rotate longitudinally of the vehicle. Support members for supporting the head-rest and a lock plate formed with a large number of locking grooves are fixed to a shaft of rotation provided between two brackets. The lock plate is rotated with the longitudinal movement of the head-rest and a stopper provided in the bracket is engaged into one of the locking grooves in the lock plate so that the head-rest is locked in its desired position.

Abstract: A driving seat for use in an industrial vehicle such as a forklift, tractor and combine is disclosed. The driving seat comprises a seat back which is divided into two portions, i.e., upper and lower portions such that the upper portion can be folded backwards relative to the lower portion so as to lower the height of the seat back. The upper portion of the seat back is connected with the lower portion of the seat back by means of a rotary support device which is capable of performing such folding operation of the upper portion of the seat back by simply pressing against the upper portion itself.

Abstract: A back frame forming a part of a seat back of a seat for use in a vehicle such as an automobile is disclosed. The back frame is extended at its lower end(s) with a reinforcement portion and this reinforcement portion is attached to the inside surface of a lower bracket of a reclining adjuster mounted to a cushion frame, so that any displacement loads applied to the back frame can be shared in part by the lower bracket to improve the strength and rigidity of both of the upper bracket of the reclining adjuster and the back frame.

Abstract: An improved vertical adjustment device for use with a seat in a vehicle such as an automobile is disclosed which is capable to adjust the cushioning function of such seat. In this vertical adjustment device, a cam with an operation lever is cooperatively connected with the sliding portions of a pair of X-shaped expansion legs by means of springs interposed between the cam and the sliding portions to energize the sliding portions in their sliding direction. The expansion legs are respectively provided between a seat support frame for carrying the seat thereon and a mounting frame to be fixed directly or indirectly to a floor of the vehicle. With this improved vertical adjustment device, the cam can be rotated to adjust the elastic forces of the springs.

Abstract: A cushion member for use in a vehicle seat is disclosed. In this cushion member, a block body formed of a soft foam material is embedded centrally of the bottom portion of a main body of the present cushion member which is formed of a harder foam material. The block body includes side walls that are not integrally connected to the main body, or separated from the main body by hardening/impregnation preventive means, while the upper wall of the block body oriented in a perpendicular direction relative to applied loads is welded integrally to the main body by means of a hardened/impregnated layer produced during formation of the main body. With the present cushion, therefore, loads applied to the cushion member are distributed over the entire block body, and at the same time the main body will not be deformed when the cushion member itself is deformed as the loads are applied thereto.

Abstract: A passive restraint for a vehicle seat comprising a seat belt is disclosed which is designed so as to secure the security of an occupant. In this passive restraint, since a retractor is mounted in the inside front portion of one of side frame sections of a cushion frame and a belt guide is installed in the outside rear portion of the same one side frame section, an input from the seat belt will be little applied to the intermediate portion of the cushion frame, and points of the input is located adjacent to the front and rear points of installation of a slide rail. As a result of this, loads of the seat belt are distributed directly over the side of the slide rail, which offers an advantage to the cushion frame from the standpoint of strength.

Abstract: A seat for use in automobiles or airplanes is disclosed which comprises a base frame of a hollow synthetic resin to be fixed to a vehicle body, a cushion body of a foam material to be placed over and fixed to the base frame, and a top member placed over the surface of the cushion body to cover the same, characterized in that the base frame is provided along its side walls a cushion body fixing flange portion as well as along its upper surface periphery with expanded portions that are formed by expanding the base frame outwardly and upwardly.

Abstract: A head-rest vertical adjustment device is disclosed which is provided with a lock mechanism to restrict the vertical movements of a head-rest stay in a guide cylinder into which the head-rest stay is inserted in a manner that it is free to move vertically. This lock mechanism comprises a lock spring of a wire material to be engaged into an engagement groove formed in the head-rest stay from a slit formed in the guide cylinder, and an operation lever to release the lock spring from its locked position. First ends of both the lock spring and operation lever are rotatably mounted onto the same projection provided in the guide cylinder and second ends of these two members are integrally connected to each other.

Abstract: A seat suspension is disclosed in which a movable frame to be mounted onto a seat cushion for an automobile so as to be resiliently movable relative to a base frame mounted onto the floor surface of the automobile. The movable and base frames are connected with each other such that the movable frame can be moved elastically and vertically by means of two links mounted crosswise and pivotally and a spring constantly biasing these two links. Between the movable and base frames, there is provided a lock mechanism which is arranged to lock the movable frame at a desired height level. The lock mechanism includes a lock piece which is provided in either the base frame or the movable frame and has a plurality of engagement recesses in a vertical direction, and a lock pin which is provided in the other frame and is adapted to be engaged within the engagement recesses of the lock piece.

Abstract: A lumbar support device is disclosed in which a cam is rotated to longitudinally move an elastic member extending across the right and left sides of a back frame and thus vary the curvature of the elastic member in its longitudinal direction so as to be able to adjust the hardness of the lumbar support portion of a seat back forming part of a vehicle seat. The cam comprises a smaller cam portion mounted at the side of the elastic member to a shaft and a larger cam portion engaged coaxially and integrally with the smaller cam portion and provided at its side facing the smaller cam portion with a guide section having a concavo-convex curved surface with respect to the elastic member. The elastic member is pushed out in accordance with both displacements of the smaller cam portion and the guide section in the larger cam portion so that the curvature of the elastic member is varied accordingly.

Abstract: A seat adjustment device for a vehicle seat which includes two lock mechanisms respectively provided in a pair of rail assemblies. One of the lock mechanisms may be a fine-pitched lock mechanism provided in either of the rail assemblies, or both of the lock mechanisms may each be fine-pitched lock mechanism respectively mounted in both of the rail assemblies. The fine-pitched lock mechanism comprises a lock plate with a tooth-formed portion provided in one of the rail assemblies and a link provided in the other rail assembly and having a tooth body to be intermeshed with the tooth-formed portion of the lock plate by means of a toggle action.

Abstract: An improved lumbar support device for use in a seat back of a vehicle seat is disclosed in which upper and lower lumbar plates are mounted in two stages independent of each other and each of the lumbar plates is connected via a connecting member to an arm engageable with a polyhedral cam, whereby the above-mentioned upper and lower lumbar plates can be moved and operated independently of each other by rotating the polyhedral cam by means of rotation of a handle shaft.

Abstract: Disclosed is a method of making a cushion body of synthetic resin with an ultrasonic welder. Ultrasonic heating and welding permits the formation of laminated synthetic resin material into a desired ornamental shape without causing any shearing effect therein.

Abstract: A novel reclining adjuster for a car seat is disclosed which is provided between the seat back and the side wall of the car body. A lock pin in engagement with a striker is positioned at the lower part of the seat back. The striker can be rotated by operating a knob to a certain extent so that the locked state of the seat back may be released.

Abstract: An arm rest device is disclosed in which a base plate, supported onto a bracket in a seat-back by means of link mechanisms, is mounted to an arm rest body in such a manner to be free to slide fore and aft and is also connected with a connecting pin of the arm rest body by means of a spring. If the arm rest body is pushed against the elastic forces of the spring, then such connection is removed and thus the arm rest body is free to move. Then, if the pressure is released, the connecting pin is caused to engage with a predetermined tooth groove in the base plate so that the angle of the arm rest body is adjusted. Thus, the inclining angle of the arm rest body can be adjusted by pushing it directly, which eliminates the provision for any knob, handle or the like.Further, the arm rest body can be adjusted such that it always maintains its horizontal position even when the seat-back is inclined.